Sound-box for phonographs.



H. A. MYERS.

SOUND BOX FOR PHONOGRAPHS.

APPUCATION FILED APR. 12. 1916.

l ,1 92,337. Patented July 25, 1916.

I N VENTUH UNITED STATES PATENT OfFFiCE;

HUBER-T A. MYERS,

SOUND-BOX FOR the art 'to which it-appertains to make and use the same,reference being bad to the accompanying-2 drawings, and to thecharacters lo'f reference marked thereon, which form a; part of thisspecification.

This invention relates to sound repro ducingi; instruments of thephonograph type,

and particularly to improvements in the sound box of such instruments.In some instruments of this character the vibrations produded on-ithestylus by the record are of a lateral character, as in the case ofrecords used oh Victorand .Edison machines, while in theicase' ofrecords used onsome other machines the vibrations produced on the stylusare of: a vertical character. In'other -wo'rds, the records used on somemakes of phonographs or s1m11ar machines have the sound iwaveundulations formed depth-wise of the groovetherein inwhich thereproducing stylus travels, while with records used on other makes ofmachines the sound 7 wave undulations are formed crosswise of thegroove,

The object of my invention isthe provision of a sound boxof thecharacter described which is simple andeificient in its constructionandcapable of universal use in connection with difi'er'ent types ofmachines of the class; described, and of being'easily and quicklyadjusted to suit the character of the groove in the record which it isde-' sired to use.

The invention is fully described in the following specification, andWhile, in its broader aspect, it is capable of embodiment in numerousforms, a preferred embodiment thereof is illustrated in the accompanyingdrawings in which Figure 1 is -a side elevation of a portion of thephonograph embodying myin'vention. Figs. 2 and 3 are enlarged side elevations of the sound box embodying the invention in operative positionfor records having grooves of difi'e-rent styles. Fig; 4 is a centralvertical section of Fig. 3. Fig. 5 is a perspective View of thesound-box l Application filed April 12,

OF TOLEDO, OHIO.

PHONOGRAPHS.

Specification ofl etters Patent. 1 Patented July 25, 1916.

i916. Serial No. 90,687.

carrying head, and Fig. 6 is a section on the line as, a; in Fig. 4.

Referring to the drawings,-1 designates the cabinet of a phonograph, *2the rotatable record supporting table carried vthereby,

and 3 the sound-box carrying arm, which extends through and is pivotedto the top of the cabinet at one side of the tabi e 2 for horizontalswinging movements with respect thereto. The'arm 3 is hollow in form andforms a portion of the condpit through which the reproduced sound wavespass, is well understood in the art. i

The sound-box embodying my invention is designated 4- and iscarriedfifor rotary movements by a head 5 adapted tobe placed intoremovable engagement with the free end of the arm 3. The head 5,ll'iitilti present instance, forms a nipple 6 one end thereof forremovably fitting into the free end of the arm 3 and is providedjthroughout its length with a passage-7, which opens communicationbetween the interior ottne.

sound-'box-and thearm 3. The outer end of the head'5 is formed on anincline to the head axis and is provided at such end around the passage7 with an annular shoulder 8 with which an annular flange 9 on the innerend of the sound-box 4c-coacts to guide the rotary adjusting movementsof the sound box with respeetto said head,

The sound-box 4 is rotatably held to the head 5 by a screw 10, whichprojectsthrough the top portion of the head in coaxial relation to theturning axis of the box 4 and is threaded into or otherwise suitablysecured. tothe inner end of said box, as indicated at 11. The screwlOris intended to turn freely in'the head 5 and is" encircled at itsouter end by a coiled compression spring 12,which has its opposed endsthrustagainst the outer side of the ,headand the headed end of the screw10, thereby coact-ing with the g ew 10 to yieldingly retain thesound-box 4r. closely, seated against the head 5 The soundbox 4 isprovided in one side thereof'with a recess or cup-like chamber 13, whichhascommunication at its bottom through a passage Ltwith the adjacent endof the passage '7 in the box carrying head I). A diaphragm 15 is mountedin the chamber 13 in spaced relation to the bottom thereof whereby it ispermitted to have free vibratory movements, and is retained in thechamber. in the present-instance, by a split retaining ring 16. A styluscarrying arm i7 is izttaehed ht one end .to thecenter of the diaphragm1,5 thence: extends transversely of the sound-box to and around thelower edge thereof and is provided at such;

. edge of the box with a vstylus carrying part .18, the axis of thestylus receivingsocket.

' of which is coincident with the turning axis-oi the soundbo; withre'spect' the The stylus carrying end with respect thereto.-

nwm be" understood that m vibration;

of the styles 19 inorder to be eonzmunieeted through'the arm 17 to thediaphragm 15 r 1 mnst'be in a plane which islongit'ud-in'al end nottransverl e to the ."diaphmgm' axis. Therefore, if the soundreproducingunduiiZ- axis oi thodii -phragni is disposed in -LX'3'$\'(;!% relationto the record-groove inwhich the stylils treyelagns Indicated-in Figs.'1 nndQ, thus pern jttingthetmnsyerge' .w-ibtutions' of the styhis'tobecommunicated I tor, the sonnd box must-be g eeu V mm with respeetto thehead's-hem the 'tion with arecord groove haying undiil'ii time of thelateral type-{so thigh 'poeition j with respect to the he adflwill inEigs.- 3 and Inasmuch asgthe swine-19.

to the diaphragm thronghithe' arm 16; On

sp the otheroha'nd, if .the nndu'lations'in the position which ithas-xihen ns'edlinlcolih and turiring'axis bfitheidiaphrgzgin liox'nre'inclined in a direct'ion opposadto the dime tion of movement of the recd'groove it isvapparent-that when-theso iiidj box is 12?.

I e15, the vvertical vibratory nioiienients which posed in thepositioz'rshowp in gFigsQIS and 4,"

with the diaphragm axis diposed lengthwise of the groox're in whichtllgsffllu'gtrav- 'are communicatedto-the. styl lis: '1Q. trans-'diaphragm through the'lnrin 17.."

The adjacent ends of the sjourid hox 4 and head are provided with parts21 end 22, 1 respectively, which react to limit the rotary adjusting.movernentscf the I sound-box with resnect to the head.

rargeinent or form of the parts, as it is Mrs-Patent, .i3-: 1. In aninstrumentjvof the class described,

irtiozzsoftlie record .ilsed are of-the lateral r, the sound-box zi'mstbe turnedts'o capable of numerous modifications without departing fromthe spirit ofthe claims.

Having thus described my invention, what I claim as new,-and' desiresecure by Let,

a swinging arm having a passage longitudinally 'therethrough and'hayingits free end terminating at its lower"- side-1n acircular' face throughwhich said passage opens, a

sound-box havinga'eircular upper and m Q in rotatable engagement 'w ith'seid face and having a sound transmitting] b'sissaiievertend;

. ing" transverslythercof ,"and opening into the face end of said agmiassege, meen'spivotnlly securing saidsound-box .to said .u'rmfiand'a'.stylus cgirried by sqnnd-box at t e edge, thereof. opposedgto itspivoted end, said. tylus having its axis coineidentto the pivotal axisofsaidsouncl bpn i 2. In an instrnmentoi the class described, ahollow armmountedifor' slwinging move ments and liiiving its outer endterminating. in a head, which had'i s-iwroided on-its under sidewithia'nn inclined; circularly fla n ged; fiico throngh n7hic1rthefouterend of thegum passege' qey' ogenq; a sound-box,

hrOugh s i nd-be: .in p ei--tenea u th i' 'i i l-Q 89d a stylusg-cartkbSdidSWQd-bdx lat-tire'edgc tliereofxopgj 'a idlface, and

withZits axis. coincident 3; In aninstrnmeiit-of; the cla ss desorihed;&1 hollow swinging a r 1 1 f -ha;ving a. head at. f" "itsouter end thtdilgh w'hichlthe am passage.

t tii'm ig,

extends, a sonnd-hox'ligu in'g its 'i'ipper end-'1 in rotatableengngeniehtwith .snidhead, "'iivith itssound-ebnununicajting passa e incommunication with the-'hecdpassage, a

pi 'ot-screw projeetingthroughle-{ihrtion of w the head inmthendjacentend of said v versely thereof wiil transmittedtoihe sound+box to connectthe twmn eens ieldi11gl with snid scr'ew and head to retain thes'mindbox 'and head-in ,y'ielding rotatebleengagemenh'and n styluscarried 7 when-0f I hare hereunto

